US2332500A

US2332500A - Safety reversible window

Info

Publication number: US2332500A
Application number: US406063A
Authority: US
Inventors: Louis I Alperin
Original assignee: Individual
Current assignee: Individual
Priority date: 1941-08-08
Filing date: 1941-08-08
Publication date: 1943-10-26
Anticipated expiration: 1960-10-26

Description

Oct. 26, 1.943. L 1 ALPERlN 2,332,500-

SAFETY REVERSIBLE WINDOW Filed Aug. 8, 1941 Y 4 Sheets-Sheet l 5 .f4- 4 INVENTOR.

4770/?/VEY Oct. 26, 1943. l, ALPERlN l 2,332,500

SAFETY REVERSIBLE wnunoy'A Filed Aug. 84, 1941 4 sheets-sheet 2 w v l v Oct. 26, 1943.

L. l. ALPERIN SAFETY REVERSIBLE WINDOW 1941 4 Sheets-Sheet 5 1F: :l E 31E-..15

Filed Aug. 8

Hm mi v INVENTogz foM/

a

3,1 Mya/ciw) BY Patented Oct. 26, 19x43v UNITED STATES PATENT OFFICE SAFETY REVERSIBLE WINDOW Louis I. Alperin, Scranton,V Pa.

. Application Augusta, 1941, serial No. 406,063

4 Claims.

My invention relates broadly -to windows and more particularly to an arrangement of doublehung, slidable and reversible window sash construction and hardware for converting existing double-hung window sashes into a reversible sash arrangement.

One of the objects of my invention is to provide a simplified arrangement of hardware which may beapplied to existing double-hung window sash installations to enable such sashes to be operated either in vertically slidable arrangement or in tilting and reversing arrangement.

Another object of my invention is to provide a construction of double-hung reversible window sash arrangement having projectible and retractible Weather-stripping at opposite sides of ach sash for excluding entry of air and moisure.

Still another object of my invention is to provide a `construction of double-hung reversible window sash in which the sashes may be tilted to restrained and controlled angular positions from a normal vertical plane. s u

A further object of my invention is to provide a construction of hardware for both the upper and lower sashes of a double-hung window for controlling the projection and retraction of weather-stripping for thus freeing the window sash preparatory to tilting or angular movement thereof. y 1

A still further object of myinvention is to provide a construction of sliding lock for application to double-hung Window sashes having means for eifectively obstructing the entry of air and moisture adjacent the sash and compositely lock- I.

ing the sash for movement in vertical planes.

Another objectof my invention is to provide a construction of a sliding lock for the sash of a double-hung window having means within kthe lock and coacting with the sash for controlling `the angular movement of the sash to selected angular positions. Y

Still another object of my invention is tov provide a sliding lock for double-hung window sashes which includes pawl and ratchet mechl' anism housed within the sliding lock for resash-cords for controlling the vertical sliding movement of the sashes.

Other and further objects of my invention reside in the constructionof hardware for reversible double-hung window sashes as set forthmore fully in the specication hereinafter following by reference'to the accompanying drawings, in which:

vFigure 1 is a front elevational view of the safety reversible window of my invention with parts broken away and shown 'in section; Fig. 2 is a vertical transverse sectional view taken on line 2--2 of Fig. l and shows more particularly the arrangement of the sashes with respect to the casing and showing in dotted lines the two sashes in a tilting position; Fig. 3 is a fragmentary longitudinal sectional View showing a portion lof the lower sash yand more particularly the left stile ovf'the window together with the sliding lock; Fig. 4v is a similar view showing the sliding lock in section and more particularly the weather-stripping member projecting withinthe sliding lock land the sash consequently locked ,against tilting movement; Fig. 5 is a View similar to Fig. 4 but showing the weather-stripping member retracted and the sash prepared for tilting;

Fig. 6 is a face View ofthe 'lower sash showing the retractible and projectible weather-stripping member; Fig. '7 is a horizontal sectional view on an enlarged scale taken substantially on line 1--1 of Fig. 4 and showing the mortise in the edge of the sash in which the weather-stripping member moves; Fig. 8 is a horizontal sectional view taken on line 8-8 of Fig. 4 and showing more particularlyr a portion of the operating knob for projecting the sliding lock with respect to the lower sash against the action of a nat-leaf spring; Fig. 9 is a horizontal sectional view taken online'S- S of Fig. 4;Fig. lois a transverse vertical sectional 'View taken substantially online Ill-I0 of Fig. 4 and showing more particularly the ratchet wheel andv associated pawls and spring members by which relatively deep notches in theV ratchet wheel may be engagedl and the sashes maintained in position to permit the sashes to slide freely up and down; Fig.` 11v is a sectional view taken substantially on line' I I '-I I of Fig. 4 and shows more particularly a portion `of the sliding-lock for the lower sash; Fig.12 is a sectional ViewN taken on line I2-|2`of Fig. 3 showing theoperating knob and associated parts e and illustrating the flat leaf spring for actuating 'to its inormal position and showing how the pawls of the flat springs engage the shallow notches on the periphery of the ratchet wheel and consequently restrain the sash against uncontrolled movement; Fig. 14 is a sectional view taken substantially on line |4-I4 of Fig. 8 and showing more particularly the deep and shallow notches on the periphery of the ratchet wheel and also illustrating the engagement of the pawls on the flat locking springs with the ratchet wheel; Fig. 15 is a sectional view through a. portion of the sash showing it tilted in full lines and wherein it is shown that the pawls on the fiat springs now engage the shallow notches on the periphery of the ratchet wheel and force the flat* springs against their abutment faces in the sliding lock and restrain the sash against uncontrolled movement; Fig. 16 is an elevational. view of the hardware applied to the upper sash with a flush mounting lever control to allow the upper and lower sashes to readily pass. eachother Fig. 17 is a fragmentary longitudinal, sectional view showing one limiting position of the. leaf spring which controls the weather-stripping in the upper sash of the double hung window; Fig. 18 is a view similarI to the view illustrated in Fig. 17 but showing the control mechanism for the leaf spring shifted to the opposite limiting position; 19 is a transverse sectional view taken on linev IvD- i9 of Fig. 16; Fig. 20 is an elevational View of the upper sash of the double-hung Window showing a modified arrangement of control means for the weather-stripping member in the upper sash with parts broken away and illus.- trated in section;- Fig. 21 is a fragmentary view partially in front elevation and partially in vertical section showing the. control means for the weather-stripping member in the upper sash as illustrated in Fig. Fig. 22. is a vertical sectional view through a portion of the upper sash and illustrating in section the control means moved to a position which interlocks the weather-stripping member with the sliding lock; Fk. 23 shows the control means of Figs. 2.0-22 shifted to a. position which enables the spring means within the mortised sash to retract the weather-stripping member from the sliding lock; Fig. 24 is a side elevational view of the upper sash of Figs. 20-23; Fig. 25 is a fragmentary front elevational view. of the upper sash frame illustrating the arrangement of the projecting andretracting means for the weather-stripping member within the sash frame.; Fig. 26 is a. transverse sectional. view on line 26-26 of Fig. 24; Fig. 27 is a. fragmentary vertical sectional view through the frame of the upper sash on line 2.1-21 of Fig.26; Fig. 28 is a perspective view of the mounting plate forming the journaling means .for the actuator of the weather-stripping member in the upper sash illustrated, in Figs. 20-27; and Fig. 2.9 is a perspective view of the cam actuator employed in the structure of the upper sash illustrated in Figs. 20-27. Y

My invention contemplates the adaptability of 4present day vertically slidable double-hung window sam to an improved reversible [and tiltable arrangement whereby each of the sashes may be 4reversed or tilted `to a position for facilitating cleaning. This-is particularly desirable for windows located at relatively high elevations, as both sides of the window may then be readily cleaned from the inside oi the building structure.

`While adaptingthe vertically slidable window `sashes to a tilting or reversible position, I also obtain a number of additional advantages such.

475 Moreover, the abutment between opposite faces as the preventing of rattling of the sash and the prevention of direct passage of air, moisture, dust or foreign matter by effective weather-stripping between the reversible or tiltable sash and a slidable locking slide which is slidable within the window frame. That is to say, the combination structure of my invention provides an arrangement not heretofore obtainable in a reversible or tiltable sash structure, for by the coaction of parts in the assembly of my invention, I pro- -vide for reversible or tiltable movement of the sash; a substantial weather proofed locking of the sash; the maintenance of the sash against rattling, and above all, I provide a mechanical assembly of very substantial strength for resisting abnormal forces which may be directed against the sash. An actuator at each side of the shaft must be released before the sash may be tilted or reversed so that accidental falls through the sash are substantially prevented.

My invention contemplates the adaptation of the hardware embodying the features of my invention both to double-hung slidable sash already installed as Well as to new installations of sash. That is to say, the hardware embodying the features of my invention may be incorporated into the sash as manufactured, or by very simple changes, existing sashes may be adapted to use the features of my invention.

Where my invention is applied to existing double-hung sashes, it is only necessary to remove the upper and lower sashes from the window frame and cut down the sash at each side approximately three-,fourths of an inch. A narrow slot or groove is then mortised into the edge of .the sash and an actuator mounted in the frame of the sash for controlling the yieldable combination lock and weather-stripping member which may be spring mounted in the mortised slot or groove in the sides of the sash frame.

The hardware fitting which controls theejection andretraction of the weather-stripping member also provides a recess for receiving the controlled pivot member extending from the sliding lock. By the coaction of the controlled pivot member, the sliding lock is movable under control 'the material removed from the sides of the sash thereby enabling the sash to be reinstalled in the Stiles of the window frame with the composite fittings of my invention applied thereto. The

sliding lock includes longitudinally extending grooves which coact with the projectible and retractible weather-stripping member carried by the sash. The sliding lock has a length corresponding with the height of the sash and slides vertically in the stiles of the window frame by reason of the interlocking relation between the controlled pivot member and the hardware tting carried by the sash and also by reason of the interlock formed between the weather-stripping member and the longitudinally extending grooves in the sliding lock. So long as it is desired to yrestrain the window sash against tilting movement with the longitudinally extending grooves in the sliding lock. This interlocking relation not only prevents unauthorized entry through the window from the outside, but also insures a relatively tight weather seal at each side of the sash.

of the weather-stripping member andthe longitudinally extendingy grooves insures against accidental yielding of the sash' should abnormal pressure be forced against'the sash. Even-when the weather-stripping memberis retracted, the sash is prevented from unrestrained'or uncontrolled tilting movement by operation of the ratchet mechanism associated with the controlled pivot member carried by the sliding lock.

The upper and lower sashes of the double-hung sash system may be vertically adjusted to any selected position, the weather-stripping device retracted in a selected,Y sash and then that* sash tilted to the selected position. The sash may be entirely reversed in order to render accessible from the interior either s ide of the windowy for convenience in cleaning the window from the inside of the building structure. Such reversing movement is at all times controlled and restrained by operation of the ratchet associated withl the controlled pivot'member. n n

The hardware of my invention is extremely simple in its manufacture and production, and embodies numerous novel features among which I mention the cut-awayportion of the upper` rend of the sliding lock which immediately engages the stile of the window frame for permitting. clearance of the sashweight rope guide pulleys housed in the window frame, and also the provision for passage of the sash weight rope without obstruction. The fact that [only two simple coacting hardware members are required as ttings at each side of the sash to accomplish the conversion of an ordinary vertically slidable sash into a convenientreversible or tiltable anti-rattling, lockable weather protected installation rendersthe hardware of my invention applicable to the broad field of double-,hung window installations for converting such window into the modern rear ,and tilting arrangement herein described. However, my invention is applicable to window sash construction on a quantity production basisjas initially supplied by the factory either in the'woodsash construction or in'metal-sash construction, in which sash construction therfactory assembly embodies the initial installation of the weatherstripping member and actuator atv eachside of the sashand the 4furnishing of a sliding lock which isA disposed intermediate the stiles of the window frame and the sash. Where the principles of my invention are embodied in metal sash, the weather-stripping device is yieldably mounted in rejectible and retractible arrangement in the opposite edgesof the sash and operated by the controllable actuator. recess is formed in the hardware forreceiving the controlled pivot member which projects from the sliding lock which is provided intermediate the metal .stiles of the metallic window frame and the metal frame of the window sash. Longitu-r dinally extending slots in the sliding' lock coact with the rejectible and retractible weather-stripping device providing the same advantagesheretofore explained in connectionwith-the installation of the hardware of my inventionin woodl' A ble-hung window containing the longitudinally A central A extending stiles 2 and3 in which the sliding locks carried by opposite edges oftheV lower sash 4 and upper sash 5 are slidable. The opposite extreme edges of the sashes are cut down in width-to receive `the sliding locks, the width of which comipensates for the material removed from the sides of the sashfthereby enabling the sash to be slidably adjustable within the longitudinally extending stiles of the window-frame. The upper sash 5 is illustrated as having sliding locks 6 and 'I applied to the opposite edges thereof. The lower sash 4 has the sliding locks 8 and 9 applied to opposite edges thereof. yInea'ch instance the thickness of the sliding locks is such that the sashes t the longitudinally extending stilesl in the' same manner that the 'sashes' as originally constructed would t within the stiles. l

` The sashes are each mortised in their opposite edges as I haverepresentedin the case of the lower sash 4 at Ill. -This mortiseterminatesshort of the top and bottom edges of the sash -so that there is no exposure for the entry of air or moisture through the window-frame. The mortise provides a housing for receiving the `weatherstripping member I I whichis 'transversely pro# jectible and4 retractible with respect to the side of the sash. The'rear edge of the weatherstripping member II carries loop rmembers I2 and I4 through which the opposite endsof longitudinally extending leaf spring I5 slidably eX- tend. The leaf spring I5 is normally substantially straight or longitudinal, as represented in Fig. 5, and in a position shown in Fig.' 5, tends to draw the weather-stripping y'member Il inwardly. In order to project weather-stripping member II, I providecentrally ofthe opposite sides of the frame of the sash, a tumbler or cam member I6, which is actuated by rotatable shaft VI'I,-which projects through escutcheon plate I8 and is actuated by control knob I9 secured to the lend thereof. p To provide mounting means for the tumbler orcam member I6, I drill the sash `4 as represented at 2,0 for the'passage of the cylindrical'portion v2`I of the tumbler or cam member I6. l'Thus by grasping the control knob 'I9 the tumbler cream member I6 I may be rotated through an'a'ng'ular distance of approximately 1809" to eject the'weatheristripping member II slot 26 insliding lock 8.- The slot 26 extends longitudinally-of the slidinglock 8 on either side of the center thereof represented at 2'?. 'The central portion 21 of the sliding lock 8 provides a mounting means for the pivot bar 24. The

pivot bar24 `contains 'a square lhub portion 28v which is rotatably mounted by means` 0I" screw 29 on the external side plate 30 of the sliding lock 8. The square hub 28 reduces in section to a square shank or terminus 3Ilthat extends into ythe reenforced sleeve-like aperture 23of the plate 22. The square shank 3I .passes through aperture 32 in the internal plate- 33 of the sliding lock Il. and is free to revolvev because of thesfact that'thechamfered head of screw 29 which passes 'through 4the correspondingly, ,apertured and chamferedv plate l0. is. screwed home to. the. limit of the screw threaded recess in the square hub ZB. allowing suncient clearancey to permitrotaf tion of the square. shanls 3l... .In order to control and restrict the. .rotation ot son-are

shank

31,1 provide-a deformed. ratchet' wheel 34 having a .square aperture 35. therethrough to permit the ratchet wheel to be inserted Over the square hub 28. and turn with thel 11u12 The ratdhet Wheel 34 is provided with ratchet teeth. 36. and; in. diametrif cally opposite positions is provided with relatiyely

deep notches

31 and 38 fprniaintaining the sash in the position. for normal vertical.. sliding movenient. In order to insure against accidental opening oi the. sash by' movement about the eene tral pivotsV I provide two ratchet engaging pawls represented at. 3.9 and 4|! ceuried` by resilient str-ip members 4 lY and 42.. 'I he resilient strip members 4l and 42 extend substantially the entire length ot the sliding lock L Each of the strip members haveA their ends turned inwardly and engaged around the members which forni.` the spacing means for the. plate members 3l and The spacer members comprise sleeves. 4.3 andV 44 through which screws 45 and 46 extend.

Screws

45 and 46 have headed ends which pass through external p1ate 30, of the sliding lock 8 and engage in screw threaded apertures in the internal plate 33 of. sliding lockf B... The ends of the resilient strip members 4| and 4Z are substantially hookshaped, as represented at 45a and 46a and cngage around the

sleeves

43 and 44. The resilient stripk members 4| and 4.2 are assembled in en,- gaged position with `respect to the

sleeves

43 and 44 before the internal plate 33 is mounted in position. When the internal plate 33 is mounted in position the sliding lock; 6 is completed as a unit and coa-cts with the sash in both the vertically sliding and angulafrly adjustable positions thereof.

In. order to lighten. the structure of the sliding lock 8 I providelongitudinally extending slots 26aA in the external plate 30 in alignment with the slots 26 in internal plate 33. The upper end of external plate 33 has the slot 26d thereof enlurged as represented at; 2Gb to facilitate the assembly of the sash when forcing into position the knotted end 41 of the sash-cord 4B. The

spacer sleeves

43 and 44 which are secured in position intermediate the external plate 30 and the internal plate 33 of the sliding lock 8 are so spaced that the knotted end at the sash-cord 11B-shown at 41 cannot pass through the space between the `the wells 5.2 of the window casing.

In order to permit the mutual passage of the sashes 4 and 5 in sliding vertical arrangement the control for the leaf spring is arranged hush with the frame of the upper sash 5. The hardware supporting the ush type of control device is represented as including plate member 53 fastened mid-way of the vertical height of the upper sash 5 and providing a journalling means fora control lever 54 which is pivotally mounted with 'respect to the sash. By moving control. lever-54 from one extreme position flush withthe sashl t0 ymeans for turning the cam 12. `illustrated in Fig. 22 the cam 12 is moved to a anopposite extreme position flush with the sash, the position o f the ejecting device for the weather-stripping member is controlled. The escutcheon plate of the hardware 53 contains ngerrecesses 55 and 56 into which the control lever 54 is adapted to move to a position ush vwith the escutcheon plate in a position to either release or lock the sash with respect to the sliding lock in Figs. 1 and 2. I have shown the upper sash 5 mortised` at; 60 to receive weather-stripping member 6| which is normally withdrawn inwardly by the action of leaf spring 62 secured at its opposite ends at 63 to the weather-stripping member 6|. The control lever 54 which is journaled by any suitable means 64 in escutcheon plate 53 projects rearwardly as indicated at 65 and engages a, diagonally extending slot 66 in a cam block 61. Vertical movement of the control lever 54 shifts the cam block 61 in a transverse direction. In the position illustrated in Fig. 17 the weather-strip member 6| is projected against the restraint 0f leaf spring 82. In the position illustrated in Fig. 18 the weather-stripping member 6| is allowed to retract under the pressure produced by the tendency of leaf spring 62 to straighten within mortise 60. In the position illustrated in Fig. 17, weather-stripping member 6l is engaged in the longitudinal groove of the .sliding lock. In the position shown in Fig. 18

the weather-stripping member 6| is retracted from the groove in the sliding lock.

I may provide a modified form of control means for the weather-stripping member in the upper sash as illustrated in Figs. 20-29. In this modified form of my invention the upper sash is recessed at 68,. to receive the mounting plate 69 Which carries a projection 10 thereon which extends into the mortise 60 of the upper sash 5.

4The projection 'lo carries a limiting stop pin 1| which forms one of the abutments limiting the movement of cam 12 which is carried by shaft 13 journaled in the projection 10 of plate 69. The end of shaft 13 is attened as represented at 14 and provides means for pivotally connecting the hinged key 15. The hinged key 15 normally hangs in a position in which the key is wholly ilush with the face of the sash so that the upper and lower sash may readily pass each other in the stiles. However the'key 15 may be readily grasped and moved outwardly and serve as a. In the position position projecting weather-stripping member 6| against the action of leaf spring 22, While in Fig. 23 the cam 12 is shown moved to a position in vwhich leaf spring 62 vretracts weather-stripping member 6|, thus freeing the sash 5 from engagement with the locking slide and permitting the .sash to swing about pivot bar 24 as a center.

Facing hardware 16 is provided on the upper sash 5 with the square recess 11 therein for receiving the end of the pivot bar 24. Step by step pawl and ratchet mechanism indicated generally at 34 is provided in the sliding lock for the upper sash in a manner similar to the explanation heretofore given for the lower sash construction. Thus the upper sash is shiftable to various angular positions and restrained in a selected position.

The sash is arranged n the Stiles in such manner that the sliding lock is wholly covered by framing strips 51, 58and 59, thereby effectively obstructing the entry of air or moisture. When weather-stripping member l is projected the entry of air or moisture is further obstructed at the saine time that the sash is locked against turning. The weather-stripping member H serves not only to exclude air and moisture but also serves to coniine the sash to vertical movement in the stiles. When, however, it is desired to angularly tilt or reverse the position of either the upper or lower sash, the control actuators 54 in the case of the upper sash 5 and the control actuators !9 in the case of the lower sash ll are operated to remove the rear abutments from the weather-stripping members Il, thereby enabling leaf springs 5 tc restrict the weatherstripping Il to a position in which the weatherstripping l l is withdrawn from and is clear of the slots 26 in the plate 33 of the sliding lool; 8. Under these conditions the sash is free' to be `angu larly tilted as represented in Figs. 2, 13 and l5 or to be completely reversed for cleaning either side of the glass from the inside of the building. The ratchet teeth 55 on retchet 34 engage the pawls 39 and lil on strips lil and 42 of sliding lock 8 and prevent unrestrained tilting movement of the sash so that under conditions where substantial pressure may be placed against the sash the sash is restrained from unlimited and uncontrolled movement. The relatively deep notches 3l and 38 disposed in diametrically opposite positions of the ratchet 34 normally maintain the sash in a vertical position instantly ready for tilting movement or reversing movement when the Weatherstripping H is withdrawn from engagement with slots 2G of sliding lock 8.

The construction of my invention provides a composite arrangement of sliding and swinging sash employing retractible and rejectible weatherstripping which serves in addition to its weatherstripping function as means for preventing tilting or reversing movement of the sash when the sash is to be used in its normal vertically slidable relationship.

I have illustrated my invention in association with frame or wood sash construction but it is to be understood that the principles of my invention are equally applicable to metallic sash construction. Moreover I have illustrated my invention in a form in which the window construction is completed by factory production. It will be understood, however, that the hardware of my invention is applicable to custom-built jobs and to the conversion of existing double-hung sashes.

I have found the construction illustrated herein highly practical and ecient in operation and while I have illustrated my invention in its pre-4 ferred embodiment, I realize that changes may be made in the shape, size and construction of the hardware and component parts shown herein and I desire that it be understood that I intend no limitations upon my invention other than may be imposed by the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States is as follows:

1. A sliding bar for guiding a double hung window sash in longitudinally extending stiles in a window frame for composite translatory and angular movement of the sash with respect to the Window frame comprising a pair of strip members symmetrically biiurcated at each end thereof for the projection and retracting of a weather stripping member therethrough from the sash, spacer members disposed between the ends of said strip members, securing means passing through said spacer members for uniting said strip members in spaced relation, a pivot bar disposed in the central portion of said strip members and pro- .spacer members jecting therefrom for pivotally engaging the window sash, and means supported between said movement of said pivot bar. i

2. A sliding bar for guiding a double hung window sash in longitudinally extending stiles in a window frame for composite translatory and angular movement of the sash with respect to the window frame comprising a pair of strip members symmetrically bifurcated at each end thereof for the projection and retracting of a weather stripping member therethrough from the sash, spacer members disposed between the ends of `said strip members, securing` means passing through said spacer members for uniting said strip members in spaced relation, a pivot bar disposed in the central portion of said strip members and projecting therefrom for pivotally engaging the window sash, and a ratchet member carried by said pivot bar intermediate said strip members, resilient strip members extending 1ongitudinally between said iirst mentioned pair of strip members and supported at opposite ends thereof by said spacer members and pawls carried by said resilient strip members and engaging said ratchet for controlling theangular movement of said pivot bar.

3. A sliding bar for guiding a double hung window sash in longitudinally extending stiles in a window frame for composite translatory and angular movement of the sash with respect to the window frame comprising a pair of strip members symmetrically bifurcated at each end thereof for the projection and retracting of a weather stripping member therethrough from the sash, spacer members disposed between the ends of said strip members, securing means passing through said spacer members for uniting said strip members in spaced relation, a pivot bar disposed in thecentral portion of said strip members andlprojecting therefrom for pivotally engaging the window sash, a ratchet member carried by said pivot bar intermediate said strip members, resilient strip members extending longitudinally between said first mentioned pair of strip members and supported at opposite ends thereof by said spacer members and pawls carried by said resilient strip members and engaging said ratchet for controlling the angular movement of said pivot bar, said ratchet member including ratchet teeth and a pair of diametrically disposed relatively deep notches therein engageable by said pawls for maintaining said pivot bar in a position of engagement with said sash for normal vertical sliding movement thereof` in the Stiles of the window frame or selectively maintaining said sash in an angular position with said pawls correspondingly engaging the teethin said ratchet.

4. A sliding bar for guiding a double hung Window sash in Ilongitudinally extending stiles in a window frame for composite translatory and angular movement o-f the sash with respect to the Window frame comprising a pair of strip members, spacer members disposed between the ends of said strip members, securing means passing through said spacer members for uniting said strip members in spaced relation,.a pivot bar disposed in the central portion of said strip members and projecting therefrom for pivotally engaging the window sash, and resilient means` supported between said spacer members for controlling the angular movement of said pivot bar.

LOUIS I. ALPERIN.

for controlling the angular` ava